#ifndef RUNNER_RUN_LOOP_H_
#define RUNNER_RUN_LOOP_H_

#include <flutter/flutter_engine.h>

#include <chrono>
#include <set>

// A runloop that will service events for Flutter instances as well
// as native messages.
class RunLoop
{
public:
    RunLoop();
    ~RunLoop();

    // Prevent copying
    RunLoop(RunLoop const &) = delete;
    RunLoop &operator=(RunLoop const &) = delete;

    // Runs the run loop until the application quits.
    void Run();

    // Registers the given Flutter instance for event servicing.
    void RegisterFlutterInstance(flutter::FlutterEngine *flutter_instance);

    // Unregisters the given Flutter instance from event servicing.
    void UnregisterFlutterInstance(flutter::FlutterEngine *flutter_instance);

private:
    using TimePoint = std::chrono::steady_clock::time_point;

    // Processes all currently pending messages for registered Flutter
    // instances.
    TimePoint ProcessFlutterMessages();

    std::set<flutter::FlutterEngine *> flutter_instances_;
};

#endif // RUNNER_RUN_LOOP_H_
